Rock County, WI

325 public highway bridges

Rock County Bridge Snapshot

Rock County, Wisconsin contains 325 public highway bridges in the FHWA National Bridge Inventory. Roughly 36.9% are rated “Good,” 26.8% “Fair,” 3.4% “Poor,” and 3.4% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in WI are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

325
Total Bridges
36.9%
Good
3.4%
Poor
3.4%
Structurally Deficient

Condition Distribution

Good
36.9% (120)
Fair
26.8% (87)
Poor
3.4% (11)
SD
3.4% (11)

All Bridges (325)

STH 59-FULTON ST

Good

Over: SAUNDERS CREEK

0.2M E JCT USH 51, Rock, WI

Built 1968 Load: 27.5 t ADT: 5,900

LRD W. EVANSVILLE-

Good

Over: ALLEN CREEK

1.8M W JCT USH 14, Rock, WI

Built 1981 Load: 27.5 t ADT: 174

LRD RANDOLPH ST

Good

Over: SAUNDERS CREEK

0.6M N JCT STH 59, Rock, WI

Built 1992 Load: 30.8 t ADT: 1,200

USH 51

Good

Over: BR ROCK RIVER

4.1M N JCT STH 81, Rock, WI

Built 1973 Load: 32.4 t ADT: 9,700

STH 67

Good

Over: BR DRY CREEK

1.1 M W JCT CTH P, Rock, WI

Built 1978 Load: 32.4 t ADT: 1,900

USH 14-STH 11

Good

Over: BR BLACKHAWK CREEK

3.3M E JCT CTH O, Rock, WI

Built 1982 Load: 32.4 t ADT: 9,600

STH 213

Good

Over: BR RACCOON CREEK

2.0M N JCT STH 81, Rock, WI

Built 1984 Load: 32.4 t ADT: 2,600

STH 81

Good

Over: BR RACCOON CREEK

2.6M E JCT CTH K, Rock, WI

Built 1990 Load: 32.4 t ADT: 3,300

LRD VICKERMAN RD

Good

Over: OTTER CREEK

1.2M N JCT STH 59, Rock, WI

Built 1990 Load: 32.4 t ADT: 223

LRD CREEK RD

Good

Over: BR TURTLE CREEK

0.5M N JCT CTH J, Rock, WI

Built 1996 Load: 32.4 t ADT: 880

LRD TURTLE TOWNHAL

Good

Over: SPRING BROOK

0.3M S JCT CTH X, Rock, WI

Built 1999 Load: 32.4 t ADT: 622

STH 11

Good

Over: DRAINAGE

0.7M W JCT USH 51, Rock, WI

Built 2001 Load: 32.4 t ADT: 5,100

LRD WUTHERING HILL

Good

Over: SPRING BROOK CREEK

CITY OF JANESVILLE, Rock, WI

Built 1992 Load: 32.4 t ADT: 2,300

CTH M

Good

Over: BR ALLEN CREEK

0.1M N JCT STH 213, Rock, WI

Built 2009 Load: 32.4 t ADT: 1,800

CTH A

Good

Over: BR BLACKHAWK CREEK

2.5M E JCT USH 14, Rock, WI

Built 2009 Load: 32.4 t ADT: 2,900

LRD READ RD

Good

Over: BR ROCK RIVER

3.1M S JCT CTH O, Rock, WI

Built 2011 Load: 32.4 t ADT: 367

CTH J

Good

Over: TURTLE CREEK TRIBUTARY 2

0.9M E JCT CTH S, Rock, WI

Built 2011 Load: 32.4 t ADT: 625

STH 213

Good

Over: BR ALLEN CREEK

1.2M N JCT CTH A, Rock, WI

Built 2021 Load: 32.4 t ADT: 2,300

IH 39 /IH 90

Good

Over: BR ROCK RIVER

1.1M S JCT STH 11, Rock, WI

Built 2018 Load: 32.4 t ADT: 57,700

CTH MM

Good

Over: BR BLACKHAWK CREEK

1.9M E JCT USH 14, Rock, WI

Built 2017 Load: 32.4 t ADT: 600

LRD MINERAL POINT

Good

Over: FISHER CREEK

2.4M E JCT STH 184, Rock, WI

Built 2020 Load: 32.4 t ADT: 755

LRD HOPKINS ROAD

Good

Over: TRIB. TO SUGAR RIVER

0.5M S JCT BELOIT RD, Rock, WI

Built 2003 Load: 32.4 t ADT: 107

LRD NORTH TOWN LIN

Good

Over: TRIB. TO WILLOW CREEK

2.7M E. JCT CTH T, Rock, WI

Built 2003 Load: 32.4 t ADT: 107

LRD SHARON RD

Good

Over: SPRING BROOK

0.5M S JCT STH 11, Rock, WI

Built 2017 Load: 33.4 t ADT: 740

STH 81

Good

Over: TAYLOR CREEK

2.2M E JCT STH 11 TO E, Rock, WI

Built 1976 Load: 34.0 t ADT: 3,600

LRD ROCKPORT RD

Good

Over: FISHER CREEK

2.4M E JCT STH 11, Rock, WI

Built 1987 Load: 34.0 t ADT: 1,608

LRD LYONS RD

Good

Over: NORWEGIAN CREEK

0.9M S JCT CTH B, Rock, WI

Built 1994 Load: 34.0 t ADT: 16

LRD MINERAL POINT

Good

Over: STEVENS CREEK

1.3M W JCT STH 184, Rock, WI

Built 2003 Load: 34.0 t ADT: 265

LRD OLD 11 ROAD

Good

Over: BASS CREEK

1.9M N JCT STH 11, Rock, WI

Built 2003 Load: 34.0 t ADT: 265

LRD JACKSON STREET

Good

Over: ROCK RIVER

.3 MILES S JCT STH 11, Rock, WI

Built 2014 Load: 34.0 t ADT: 4,000

LRD ELM DRIVE (DEA

Good

Over: TURTLE CREEK TRIBUTARY

3.2 MILES E OF JUNCTION W, Rock, WI

Built 2022 Load: 34.3 t ADT: 100

LRD LEEDLE MILL RD

Good

Over: BADFISH CREEK

0.7M W JCT STH 138, Rock, WI

Built 2011 Load: 34.7 t ADT: 255

LRD MILWAUKEE ST

Good

Over: ROCK RIVER

0.4M E JCT STH 11, Rock, WI

Built 2020 Load: 34.7 t ADT: 6,700

CTH J

Good

Over: TURTLE CREEK

JUST NORTH OF SHOPIERE RO, Rock, WI

Built 2022 Load: 35.3 t ADT: 600

STH 81

Good

Over: EAST FORK RACCOON CREEK

2.4M E JCT CTH H, Rock, WI

Built 1990 Load: 35.6 t ADT: 3,300

LRD CREEK RD

Good

Over: CMSTPP RR

3.4M E JCT STH 140, Rock, WI

Built 2020 Load: 35.6 t ADT: 480

LRD HOPKINS RD

Good

Over: BR SUGAR RIVER

0.9M N ILLINOIS ST LINE, Rock, WI

Built 1994 Load: 35.6 t ADT: 82

LRD SNYDER RD

Good

Over: STEVENS CREEK

2.2M W JCT STH 184, Rock, WI

Built 1996 Load: 35.6 t ADT: 105

STH 59-STH 213

Good

Over: ALLEN CREEK

0.9M E JCT STH 213 TO S, Rock, WI

Built 2000 Load: 35.6 t ADT: 3,200

STH 11 EB

Good

Over: MARKHAM CR

1.5M E OF JCT HANOVER RD, Rock, WI

Built 2002 Load: 35.6 t ADT: 2,350

STH 11 WB

Good

Over: MARKHAM CR

2.0M W JCT USH 51, Rock, WI

Built 2002 Load: 35.6 t ADT: 2,350

LRD JOHNSON DR

Good

Over: N BR BASS CR OVERFLOW

3.6M N JCT STH 213, Rock, WI

Built 2003 Load: 35.6 t ADT: 275

CTH H

Good

Over: RACCOON CREEK

1.0M S JCT STH 81, Rock, WI

Built 2005 Load: 35.6 t ADT: 422

IH 39 NB / IH 90 W

Good

Over: TURTLE CREEK

0.5M W JCT CTH S TO E, Rock, WI

Built 2018 Load: 35.6 t ADT: 26,750

IH 39 SB / IH 90 E

Good

Over: WSOR

3.7M S JCT STH 59, Rock, WI

Built 2019 Load: 35.6 t ADT: 26,750

LRD POLZIN ROAD

Good

Over: MARSH CREEK

0.5 MILES SOUTH OF USH 14, Rock, WI

Built 2021 Load: 35.6 t ADT: 112

STH 26 NB

Good

Over: OTTER CREEK

3.5 MI. N STH 59, Rock, WI

Built 2013 Load: 36.0 t ADT: 13,900

STH 26SB

Good

Over: OTTER CREEK

0.2 MI. S OF CTH N, Rock, WI

Built 2013 Load: 36.0 t ADT: 13,900

LRD CARVERS ROCK R

Good

Over: TURTLE CREEK

4.0M S JCT USH 14, Rock, WI

Built 2017 Load: 36.3 t ADT: 231

CTH G

Good

Over: WATERWAY

7 M N JCT STH 81, Rock, WI

Built 2015 Load: 36.3 t ADT: 9,000

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial